SLUB: Don't print out OOM warning for __GFP_NOFAIL

We must check for __GFP_NOFAIL like the page allocator does; otherwise we end
up with false positives. While at it, add the printk_ratelimit() check in SLUB
as well.

Cc: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

mm/slub.c

@@ -1631,7 +1631,8 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 		c->page = new;
 		goto load_freelist;
 	}
-	slab_out_of_memory(s, gfpflags, node);
+	if (!(gfpflags & __GFP_NOWARN) && printk_ratelimit())
+		slab_out_of_memory(s, gfpflags, node);
 	return NULL;
 debug:
 	if (!alloc_debug_processing(s, c->page, object, addr))